本文選題：昌寧-孟連帶 + OIB型變玄武巖��； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：長(zhǎng)期以來昌寧-孟連結(jié)合帶一直是國(guó)內(nèi)外地質(zhì)專家、學(xué)者進(jìn)行古特提斯洋構(gòu)造演化研究的熱點(diǎn)地區(qū),通過多年的研究工作,新的發(fā)現(xiàn)、新的認(rèn)識(shí)層出不窮,極大的提高了該區(qū)的研究。但是,對(duì)昌寧-孟連結(jié)合帶原型沉積盆地的大地構(gòu)造性質(zhì)、規(guī)模和演化歷史,不同的學(xué)者和專家有不同的認(rèn)識(shí)和理解。滇西昌寧混雜巖帶屬于昌寧-孟連結(jié)合帶的北延部分,該混雜巖帶呈北西-南東走向,東側(cè)與崇山巖群、三疊紀(jì)的花崗閃長(zhǎng)巖呈斷層接觸,西側(cè)與西盟巖群,喜鵲林組呈斷層接觸。通過對(duì)滇西昌寧混雜巖帶系統(tǒng)的區(qū)域地質(zhì)調(diào)查和詳細(xì)的剖面研究發(fā)現(xiàn),它是由不同時(shí)代和不同成因的地質(zhì)體混雜而成。研究表明,混雜巖帶可分為5個(gè)地質(zhì)單元。它們之間互成斷層接觸。作為基質(zhì)的溫泉組形成于靠近大陸斜坡的的深水盆地環(huán)境,發(fā)生了區(qū)域低溫動(dòng)力變質(zhì)作用與4期變形。原地巖塊中的瀾滄巖群經(jīng)歷過高壓變質(zhì)作用。原地巖塊中的西盟巖群經(jīng)歷過區(qū)域中溫變質(zhì)作用。外來巖塊中的的變玄武巖為泥盆紀(jì)的OIB型變玄武巖,共發(fā)生過一期變質(zhì)和兩期變形,第一期變質(zhì)為同變形的變質(zhì),屬于綠片巖相的區(qū)域低溫動(dòng)力變質(zhì)作用,第二期變形主要是先存片理的褶皺,在強(qiáng)變形部位形成片理S2。外來巖體中的片麻狀花崗閃長(zhǎng)巖經(jīng)歷過區(qū)域低溫動(dòng)力變質(zhì)作用。
[Abstract]:For a long time, the Changning-Menglian combined zone has been a hot spot for geological experts and scholars at home and abroad to study the tectonic evolution of the PaleoTethys ocean. Through many years of research work, new discoveries and new understandings have emerged in endlessly. The research in this area has been greatly improved. However, different scholars and experts have different understanding and understanding of the tectonic properties, scale and evolution history of the prototype sedimentary basin in Changning-Menglian belt. The Changning melange belt in western Yunnan belongs to the north extension part of the Changning-Menglian combination belt. The melange belt has a north-south-east strike, the east side is in contact with the Chongshan rock group, the Triassic granodiorite is in fault contact, and the west side is in contact with the west allied rock group. The magpie group was in fault contact. Based on the regional geological survey and detailed profile study of the Changning melange belt in western Yunnan, it is found that it is composed of geological bodies of different ages and different genesis. The study shows that the melange belt can be divided into five geological units. They are in contact with each other on a fault. The hot spring formation, as the matrix, was formed in the deep-water basin environment near the continental slope, and the regional low-temperature dynamic metamorphism and deformation occurred in the 4th stage. Lancang rock group in situ rock block has undergone high pressure metamorphism. The Ximeng rock group in the in-situ rock block has experienced regional metamorphism. The metamorphic basalt in the extraneous rock block is OIB type metamorphic rock of Devonian. The first metamorphism is the same deformation metamorphism, which belongs to the regional low-temperature dynamic metamorphism of greenschist facies. The second stage of deformation is mainly the fold of the tectonics, and the S2 is formed in the strong deformation position. The granodiorite in the extraneous rock mass has undergone regional low temperature dynamic metamorphism.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P588.36

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相關(guān)期刊論文 前1條

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